From nobody Mon Feb 9 19:10:53 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linux.alibaba.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1658152609939607.1839703388086; Mon, 18 Jul 2022 06:56:49 -0700 (PDT) Received: from localhost ([::1]:49230 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDREu-0004eH-UA for importer@patchew.org; Mon, 18 Jul 2022 09:56:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37430) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDOpn-0007WW-AL for qemu-devel@nongnu.org; Mon, 18 Jul 2022 07:22:43 -0400 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]:45272) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDOph-0000iM-NT for qemu-devel@nongnu.org; Mon, 18 Jul 2022 07:22:43 -0400 Received: from localhost(mailfrom:kangjie.xu@linux.alibaba.com fp:SMTPD_---0VJjIA87_1658143039) by smtp.aliyun-inc.com; Mon, 18 Jul 2022 19:17:19 +0800 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R181e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04400; MF=kangjie.xu@linux.alibaba.com; NM=1; PH=DS; RN=5; SR=0; TI=SMTPD_---0VJjIA87_1658143039; From: Kangjie Xu To: qemu-devel@nongnu.org Cc: mst@redhat.com, jasowang@redhat.com, hengqi@linux.alibaba.com, xuanzhuo@linux.alibaba.com Subject: [PATCH 06/16] virtio-pci: support queue reset Date: Mon, 18 Jul 2022 19:17:03 +0800 Message-Id: X-Mailer: git-send-email 2.32.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=115.124.30.45; envelope-from=kangjie.xu@linux.alibaba.com; helo=out30-45.freemail.mail.aliyun.com X-Spam_score_int: -98 X-Spam_score: -9.9 X-Spam_bar: --------- X-Spam_report: (-9.9 / 5.0 requ) BAYES_00=-1.9, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_SPF_WL=-7.5 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 18 Jul 2022 09:49:04 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1658152611207100001 Content-Type: text/plain; charset="utf-8" From: Xuan Zhuo PCI devices support vq reset. Based on this function, the driver can adjust the size of the ring, and quickly recycle the buffer in the ring. Signed-off-by: Xuan Zhuo --- hw/virtio/virtio-pci.c | 16 ++++++++++++++++ include/hw/virtio/virtio-pci.h | 1 + 2 files changed, 17 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 45327f0b31..35e8a5101a 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1246,6 +1246,9 @@ static uint64_t virtio_pci_common_read(void *opaque, = hwaddr addr, case VIRTIO_PCI_COMMON_Q_USEDHI: val =3D proxy->vqs[vdev->queue_sel].used[1]; break; + case VIRTIO_PCI_COMMON_Q_RESET: + val =3D proxy->vqs[vdev->queue_sel].reset; + break; default: val =3D 0; } @@ -1333,6 +1336,7 @@ static void virtio_pci_common_write(void *opaque, hwa= ddr addr, ((uint64_t)proxy->vqs[vdev->queue_sel].used[1]) << = 32 | proxy->vqs[vdev->queue_sel].used[0]); proxy->vqs[vdev->queue_sel].enabled =3D 1; + proxy->vqs[vdev->queue_sel].reset =3D 0; } else { virtio_error(vdev, "wrong value for queue_enable %"PRIx64, val= ); } @@ -1355,6 +1359,17 @@ static void virtio_pci_common_write(void *opaque, hw= addr addr, case VIRTIO_PCI_COMMON_Q_USEDHI: proxy->vqs[vdev->queue_sel].used[1] =3D val; break; + case VIRTIO_PCI_COMMON_Q_RESET: + if (val =3D=3D 1) { + proxy->vqs[vdev->queue_sel].reset =3D 1; + + virtio_queue_reset(vdev, vdev->queue_sel); + + /* mark reset complete */ + proxy->vqs[vdev->queue_sel].reset =3D 0; + proxy->vqs[vdev->queue_sel].enabled =3D 0; + } + break; default: break; } @@ -1950,6 +1965,7 @@ static void virtio_pci_reset(DeviceState *qdev) =20 for (i =3D 0; i < VIRTIO_QUEUE_MAX; i++) { proxy->vqs[i].enabled =3D 0; + proxy->vqs[i].reset =3D 0; proxy->vqs[i].num =3D 0; proxy->vqs[i].desc[0] =3D proxy->vqs[i].desc[1] =3D 0; proxy->vqs[i].avail[0] =3D proxy->vqs[i].avail[1] =3D 0; diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h index 2446dcd9ae..e9290e2b94 100644 --- a/include/hw/virtio/virtio-pci.h +++ b/include/hw/virtio/virtio-pci.h @@ -117,6 +117,7 @@ typedef struct VirtIOPCIRegion { typedef struct VirtIOPCIQueue { uint16_t num; bool enabled; + bool reset; uint32_t desc[2]; uint32_t avail[2]; uint32_t used[2]; --=20 2.32.0